blazin

iTrader: (16)

Hey I was on the dyno doing a dyno tune we got all the driveability tuning done, then we went to work on the W0T and the pressure would drop 10-15 psi when we started to go into boost so I couldnt finish the tune. Here is my fuel setup.
5 month old TRE 255 Pump
Stock Lines with a vette regulated fuel filter.

We tried to hot wire the pump and then checked voltage and it stayed solid. The pressure doesnt bleed off and we verified there is no leaks inside the tank.

Time for a new pump?

EPP

iTrader: (22)

Your one fuel pump may be too small for your hp. What is your combination? Bob

blazin

iTrader: (16)

Just a basic 7-8psi 5.3 pry 450 hp on a mustang dyno.

ls1290

iTrader: (20)

The vette fuel filter./regulator is marginal even for stock.

blazin

iTrader: (16)

Hmm so what setup do I need this was happening at about 200 hp

98Camarod

iTrader: (43)

Boost referenced regulator after the rails, change your IFR to a flat value, make all your offsets the same as the 0kpa values all the way across.

BadgeZ28

iTrader: (28)

98 camarod can you be more detailed in what changes need to be made to boost reference? Thanks

98Camarod

iTrader: (43)

Feed the rails with fuel, then go to the adjustable fuel pressure regulator, run the return.

Options for feed: use stock feed, run a new feed
Options for return: use evap line as return, use stock feed as a return since you ran a new feed

If you use the evap, then you have to do other things and that depends on your year.

blazin

iTrader: (16)

Got any pics of your setup?

98Camarod

iTrader: (43)

I used the stock feed and used the evap as the return. You have to re route the lines on the tank, vent the tank, and plug the middle part of the tee.

WS6HUMMER

iTrader: (19)

So glad I went to a boost referenced FPR & return setup. Dont regret it one bit.

BlkHwk

iTrader: (8)

I ran -8 for the feed and stock -6 feed for return-boost ref. FPR after the rails. That would be overkill for what you are running right now but it would allow for more in the future. In fact there are lots of guys still using the stock -6 for quite a bit of power. 255 should be plenty for 450 to the wheels.